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A major aspect of the label is a color mark which represents the toxicity of the material by a color code. Thus the labelling scheme proposes four different colour labels: viz red, yellow, blue, and green. [4]
It is advised to check the references for photos of reaction results. [1] Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2]
Benzophenone has been found in some fungi, fruits and plants, including grapes. [4] It is a white solid with a low melting point and rose-like odor [ 5 ] that is soluble in organic solvents. Benzophenone is the simplest diaromatic ketone .
[4] The second edition was released in 1986, HMIS II, which introduced letter codes for identifying personal protective equipment to be used, and the 'asterisk' to the Health bar, to identify when a substance poses a long term health hazard, such as carcinogens. This would be placed in the same box as the health number. [3] [5] [6]
[4] Column J is the color scheme used by the molecular visualizer Jmol. [9] Column R is the scheme used by Rasmol; when two colors are shown, the second one is valid for versions 2.7.3 and later. [9] [10] Column P consists of the colors in the PubChem database managed by the United States National Institute of Health.
These hazard codes are not part of the NFPA 704 standard, but are occasionally used in an unofficial manner. The use of non-standard codes may be permitted, required or disallowed by the authority having jurisdiction (e.g., fire department). [3] — No special notice (the correct format is to leave the white square blank, but sometimes a dash ...
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4 Guidance for use of colour codes 4.1 General 4.2 Colour codes to express the status of hazard 4.3 Colour codes to give supplementary information 4.4 Consideration for human factors and colour blindness Annex A Examples on the use of colour codes in practice Annex B Recommendations for colour selection